Heater Group

[git-greatguy]

Hi, i'm trying to setup a group from 10 brt-100-trv heater controller.

1- Only 2 entites for this group device shown in Home assistant : "child lock" and "window detection". no pressets / no set heating point etc...
If i switch on or off any of this 2 available control trough HA, mqtt message is publish in the correct topic but any device from the group are updated and nothing happen on the phisical device.

2- Switching to node-red and trying to publish mqtt message for the group, same behavior. Any member of the group get updated from published messages.

I tried same operations with a group of light and everything went fine under HA and node-red/mqtt publish.

following this guide : https://www.zigbee2mqtt.io/guide/usage/groups.html#controlling
Is this guide only valid for specific device such light or i'm wrong in my setup ?

thanks for your help !